Truck tipping mechanism with initial lift lever



y 1952 c. R. GOLAY 2,603,518

TRUCK 'I'IPPING MECHANISM WITH INITIAL LIFT LEVER Filed Feb. 13, 1948 2Sl'lEETS-SHEET 1 INVEN TOR. (2/4 P16! 6014) y 15, 1952 c. R. GOLAY2,603,518

TRUCK TIPPING MECHANISM WITH INITIAL LIFT LEVER Filed Feb. 13, 1948 2SPMTS -SHEET 2 1M [.NTOR. J c /g zAy X 6' 47 Patented July 15, 1952TRUCK TIPPING MECHANISM' WITH INITIAL LIFT LEVER c r 7 Charles R. Golay,Cambridgeicity, 1nd Application February 13, 1948; Serial i 8,168

3 Claims. (Cl. 294-22) This invention relates to new and usefulimprovements in elevating or tipping hoists which are particularly,though not specifically, designed for adaption to the dumping body of avehicle.

The primary object of this invention resides in the provision of atipping hoist for vehicle dumping bodies which employs a hydraulic ramas the source of power for elevating the body. Economy of space is arequisite of such a hoist when it is supported beneath a dumping body bythe vehicle frame, therefore it is necessary that the ram lie in asubstantially horizontal plane bounded above and below by the vehiclebody and frame respectively. It is, therefore, another object of thisinvention to provide a hydraulic ram hoist for vehicle dumping bodieswhich satisfies the requisite of space economy by folding compactlybetween the frame and body when inoperative, yet providing such a hoistapparatus which is sufficiently efficient to accomplish its desiredresult.

It is common knowledge that the first portion of the body tippingelevation is the most difficult to manage as it is during that portion,before the load weight is shifted beyond the point of support, that theload is the heaviest. Because of the original horizontal disposition ofthe hydraulic ram coupled with the extreme weight characteristic of theload to be lifted from this original position it is necessary that thehoist apparatus be of an extremely heavy and oversize construction, or ameans must be provided to aid 21. smaller, low pressure ram in theprimary elevation of the dumping body. It is, therefore,

- another object of the present invention to prowhich is of an extremelysimple and durable construction which may be manufactured and installedat a relatively small expense.

Still further improvements and advantages of this invention will readlyappear to those skilled in the art when the specification and claims areread in the light of th accompanying drawings.

In the drawings:

Fig. 1 is a perspective view of the assembled hoist.

Fig. 2 is a view in side elevation of the hoist, vihicle frame and bodyin a normal lowered po- 51 on.

Fig. 3is similar to Fig. 1 with the body and hoist in an intermediateelevated position.

Fig. 4 is a view similar to Fig. 3 illustrating a greater elevatedposition of the parts and illustrating the modified roller track.

Fig. 5 a perspective view of roller-track. 1

With reference now to the drawings accompanying this specification whichillustrate the preferred embodiment of this invention, and in which likecharacters indicate similar parts throughout, A designates the frame, orsubframe, of a vehicle which has a dumping body B supported on sidesills I; The sills I are pivoted conventionally at the rear endsthereof, as at 2, to the rear end of the frame in a manner permittingthe forward end of the body to be elevated above the frame aboutthepivot 2.

A pintleA is rigidly supported transverse the frame A intermediate thelength thereof. A pair of channel bars 3 are revolubly suspended fromadjacent ends thereof and in opposed, spaced apart 1 relationship on thepintle 4. A pin 5 rigidly interconnects the lower, second adjacent pairof ends of the bars 3 retaining them in parallel positions. A secondpair of channel bars 6 are secured one to each of the upper ends of thebars 3 to extend at-approximately a 30 degree angle from thelongitudinal center line of the bars 3. These second bars '6 are rigidlyinterconnected at their extremities by a second pin 1 on which iscentrally, revolubly supported a large metallic roller 8. Thus thecombination of the centrally pivoted pairsof parallel, opposed channelbars form an elongated lever.

A hydraulic ram cylinder C provided with a reciprocating ram piston 9 isprovided as the power source for the hoist apparatus. The base end ofthecylinder is revolubly secured on the pin 5, which is supported betweenthe lower ends of the bars 3. The outer end of the reciprocal ram piston9 is secured in a fitting I0 which is rigidly carried, at thelongitudinal center 'of an elongated tubular housing 20.

A pair of cylindrical arms- 2 I are telescopically insertedone in'eachend of, the tubular housing 20, and each' of. these arms are providedwith rigidly secured L-shaped plates 22 at their outer extremities.

The plates 22 are secured one to each of the spaced body sills l at sucha distance rearward along the body from the pintle 4 so as to place thepiston 9 in a fully retracted position in the cylinder C when the bodyis in its normal, lowered, horizontal position. When the body is in thedescribed lowered position, as illustrated in Fig. 2, the cylinder Cwill be substantially horizontally disposed and the lower ends of thethe modified channel bars 3 will be forwardly and upwardly pitched atsubstantially 30 degrees from the horizontal' to dispose their integralbars 6 in a horizontal position forwardly from the pintle 4.

It is the centrally pivoted lever formed by the pairs of channel 'bars'3and 6 which'act asthe elevating booster to aid the ram in tipping thedumping body.

When fluid is admitted to the cylinder; C 7 through a flexible tubing30, from an external.

source, the increased pressure will tend to cause an extension of theram piston 9. However, the

weight of the body will cause, insteadfof aprojection of the piston, arearward movement pr the cylinder of a force equal to that attempting toproject the piston.

The rearward movement of the cylinder will cause a depression of thelower end of the bars 3 and a corresponding elevation of therearwardlyextendingendsofthe bars 6. V i V 7 -As thearm's 6 continue, torise-the roller 8; will contact a roller plate 3i, carriedlongitudinally beneath the body, and an upward-and rearward force willbe exerted beneath the bodycausing; a

tilting elevation thereof.

Because the forward end ofthe bodyi's furtherest'. from the pivotedconnetcion ofthe body "and 4 dumping vehicle itself. The placement andmanner of operation of the fluid pressure supply means wouldbecontrolled by the particular circumstances existing.

From the'foregoing description of the embodiments of this'invention itmay be readily seen that a structural means'has been provided forincorporation with a straight push ram type of dumping body hoist whichpermits a reduction in the size and pressure requirements of themechanism yet which increases the efficiency of the the :frame that endwill be the more easily lifted, 7

thus the cylinder will continue to moverearwardly rather than extendingthe piston until the arms 3, are brought to vertical positions at whichtimev they firmly abut with abeam '32'secured transverse the frame A. y1 l .Whenthe arms 3 abut with the beamll the bars ,6 havebeenelevated toaposition of substantially 60 degrees above the horizontal and likewisethe bodyhas also been elevated to anintermediate lift position. At thistime the cylinder is restricted from further rearwardmovement, and atthis time the rampiston begins its projection to completethe elevationof the body,

which has been elevated sufiiciently totplace the cylinder, at an angleabove the horizontal great enough to permit it to easily raise the bodythrough its remaining tilting angle.

Naturally, the lowering of the body is a converse operation to that justdescribed for raising the body.

The'modification set'forth in Figs. 4 and 5 is directed to a modifiedroller track which comprises an inverted channel bar .40 which issecured longitudinally beneath the underside of the body. This invertedchannel bar 40 is secured beneath the body above the free end of thechannel bars 6 in such a mannerand position; so that-the roller 8 caried by these bars 6 will 'contact a rearwardly, angularly dependingplate 4| which is rigidly secured longitudinallybeneath the channel bar40.

transverse the channelway and from it rollonto I could be a powerdrivenmeans carried by a tractor or other vehicle or, a manually or poweroperated supply means could be. mounted on the hoist inits functionaloperation. It may also be readily seen that the structure of the hoistapparatus comprising the embodiment of this invention is of a durableand sturdy design which may be manufactured and installed at arelatively inexpensive cost.

-With .full belief that I have contemplated all modificatio'nsi of thisinvention which fall within the scope ,of thelappended claims what Idesire to claim in Letters-Patent is:

l.;-An elevating hoist for vehicle dumping bodies comprising, incombination, a vehicle frame,

a; dumping, body supported on the frame and pivoted thereto'transversetherear'; endithereof, a pintle supported transverse the'frame interimediate the lengththereof, a lever composed-0F a'pair of bars:rigidlyjoined'to form an'obtuse angle" therebetw'een, said leverrevolubly' supported on the pintle atthe juncture of the two barscomprisingthe same, a hydraulically operable extensible ram; one end :ofsaid 'ram being revolubly supported onone' end of the lever, the otherend of the ram being revolubly secured to the underside ofthe bodyrearwardly from the lever, a roller plates'upported longitudinallybeneath-the dumping body vertically aligned above the lever, a rollerrevolublysupported by that end'of the lever remote to the ram,a'leverengaging stop "carried by the frame substantially in verticalalignment beneath the lever pivot, and means for operating the ram toextend the same. '2. A structure as defined in claim" 1 wherein,

said-lever and said ram are substantially horizontally disposed when thebody is in its 10wered position, with that end'of said lever "supportingthe roller being forwardly disposed rela tive to the vehicle. w

3. A structure'as defined in claim-l wherein,

the'rolle'r plate is provided withdependi'ng side edges'which-formbetween them a channelway for the reception of the lever carried roller,a

second plate-having an end-in the channelway, and said second plateextending downwardly and rearWardly-toward the rear of thebody,-thep'a'rts operating :whereby the lever carried roller can the.second plate.

- oHnRLEs-R; GOLAY.

REFERENCES CITED The following references are of record in the file ofthis patentf 4 UNITED STATES PATENTS Number Name Date r 1,904,922" 3Jung'ersen Apr. 18, 1933 2,319,840 Barrett May 25, 1943 2,437,656Steenhoven Mar. 9, 1948 FOREIGN PATENTS Number Country Date 7 22,335Australia of 1929

